Carburetor



sepf. 1925. 1,553,130

F. BAVERJEY CARBURETOR Filed July 13, 1916 2 Sheets-Sheet l I v I I u1u Sept. 8, 1925.

F. BAVEREY GMBURETOR Filed July 13, 1916 2 sheets-sheet INVENTOR QM! xQM/MU W @amm WITN ESSES Patented sept. s, 1925.

y um'rao STATES y1,553,130 PATENT oFFicE.

FRANCOIS BAVRRRY, on LYON, FRANCE, AssIGNoR To SOCIETE nu CARBURATEUR ZENITH, oF LYON, FRANCE, A CORPORATION or FRANCE.

CARBURETOR. l

Applicationy filed July 13,

- companying drawings, formingpart pf this specification, in whicht Figures 1, 2 and 3 are diagrammatic vlews illustrating the different forms of carburetors embodying my invention;

Figure 4 is a plan view taken" partly in section through a commercial carburetor having the characteristics illustrated in Figure 3; and Y Figure 5 is a. developed vertical section .taken on the line ,VI-VI of Figure 4.

My invention relates broadly to carbu` retors, and more particularly those of the double Venturi type. It is designed to provide a simple and eiiicient device which will give the proper mixture at widely varying speeds, suctio-ns and loads under suchy conditions as those existing on automotive vehicles.

Referring more particularly tothe form of carburetor illustrated particularly `in Figure 1, there is a main venturi V and a secondary `smaller venturi 'v placed coaxiallyv in the air passage of the main venturi with its intake B outside the main venturi and its discharge end within and preferably beyond the most restricted part of the (same, where the vacuum is substantially at a maximum.` y

The fuel passage E enters the smallerventuri laterally through its side and preferably inthe region of highest vacuum therein. in this form, the passage E has an air` inlet G, which may be adjusted by a suitable valve R, to vary or modify the flow of fuel therethrough; -and the liquid fuel, flow is controlled by a constriction-K in a vertically extending collecting Chamber exterior of the venturi and connected at its lower portion to the constant level reservoir indicatedl in the drawings to the right. I

Figure 2 illustrates another construction, in which the fuel emulsion, automaticallyv proportioned, is furnished by a submerged nozzle L, placed near the bottom of a well H, which is open at the top through a calibrated or restricted orifice if. The col-A lecting chamber Sil/,delivers the emulsion to i916. serial No. 109,039.r

the passage E, which may or may not beopen to the atmosphere at G. The chamber.

J may have any length desired, and the constant level supply, the submerged nozzle, and the well mayl therefore `be placed at some distance from the main air passage and throttle valve, as more fully explained vin my United States Patent l\o..1,25y9,072 of March 12th, 1918. The use of the double v venturi permits the use of an long chamber J, because there is Ja comparatively high IvacuumA at D'Where this conduit opens.

` y In` Figure 3 there is shown another modi fication. in which the emulsion-producing means consists of a nozzle K and a reatively. constant flow nozzle L, leading into a passage v having an atmospheric well, both being connected to conduit E, having an air inlet G and an air control valve R.

y Figures 4 and 5 show the construction of a carburetor'having the suction=controlled nozzle and substantially constant flownozzle shown diagrammatically in Figure. 3. As shown in these figures, the main Venturi tube V vis disposed horizontally. Co-axially with the main venturi is placed the secondary venturi o, held in position by a screw b. 'At the point D of about maximum vacuum in the small venturi is a circular groove a, so arranged thaty the fuel emulsion coming from the channel E is practically uniformly spread around the wall of the small venturi.

` The nozzle K, controlled more by suction, which for convenience isimade` with the restricted passage or calibration at its lower end, communicates with the channel E having a regulable opening Gto the atmosphere,

-ner surface of the well H, andis carried to 'which vopening is controlled by` means of The submerged nozzle with more the secondary venturi through the channel E. Small holes e through bottom part of the tube T. facilitate the carrying of the lliquidxfuel by the air at times when there is a very low suction, when the well H is partially lled with liquid. A slow speed device is indicated atM, leading to the sup ply passage at the throttle and is similar to that shown in my United States Patent No. 1,186,371 of June 6, 1916.

In all of the forms shown, the fuel follows the surface of the small venturi 'and emerges therefrom in the shape of a hollow the taper of the secondary venturi is very tioned nozzle.

slight, the parts followed by the fuel stream is only very slightly conical, With -the result that the fuel remains in the central portion of the carburetor Without condensation on the surface thereof.

rlhe invention is not limited to the forms shown, but may be embodied in other structures fvvithin the scope of the claims.

l claim:

1. In a carburetor, a carbureting chamber having an air inlet, and a mixture outlet, a throttle valve in said outlet, a constant level chamber supplying Iliquid fuel, a fuel nozzle, a well connected With said constant levelchamber and said nozzle, said nozzle being fed from said Well slightly above the normal level therein, air being bled into said Well slightly above such normal level, a second nozzle leading-to the carbureting chamber adjacent the throttle, from said Well at a point below the fuel' level therein, and another Well communicating With the atmosphere and fed from said constant level chamber by a restricted passageway and adapted to supply fuel to said first men- 2. ln a carburetor, a carbureting chamber having an air inlet, and a mixture outlet, a throttle valve in said outlet, a constant level chamber'supplying liquid level, a fuel nozzle, a Well connected with said constant level chamber and said nozzle, said nozzle being fed from said well slightly above the normal level therein, air beingr 'bled into said well'slightly above such normal level, a second nozzle leading to thel carbureting chamber adjacent the throttle, from `adapted to supply fuel to said first/mentioned nozzle.v n

.3. A carburetor having a primary venturi, a secondary venturi extending' Within the primary venturi, a feed channel extending into the secondary venturi, a constant level reservoir, a plurality of fuel passages fed by said constant level reservoirand discharging into said feed channel, and a regulable air inlet for said feedchannel.

4. A carburetor havin .a primary venturi, a secondary venturi projecting into the primary venturi, 4a constant level reservoir, a collecting chamber and an atmospheric Well rboth. located at one side of the 'secondary venturi and both connected to the constant level reservoir and havingJ common air bledoutlet in the second venturi, substantially as described'. r

ln 'testimony whereof, l have hereunto set my hand.

` @renncors entrenar. 

